#23732 [Opn->Bgs]: Assignment to global variable overwrites session-value

ID: 23732 Updated by: mgf@php.net Reported By: daniel dot burckhardt at sur-gmbh dot ch -Status: Open +Status: Bogus Bug Type: Session related Operating System: Linux PHP Version: 4.3.1 New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php This is expected behaviour: at version 4.3.0, a defect was corrected so that now the global variable and the $_SESSION[] entry always reference the same value. (In versions 4.1 and 4.2 this was not the case, which could lead to unexpected and non-intuitive results.) Previous Comments: ------------------------------------------------------------------------ [2003-05-21 04:32:11] daniel dot burckhardt at sur-gmbh dot ch (this seems to be the same problem as in Bug #20709 Session variable getting mysteriously set which has been closed) When register_globals is On, the assignment $foo = 'bar'; has the side-effect of setting $_SESSION['foo'] = 'bar'; The following script shows this - enter a new value into the input-field and watch how $_SESSION['foo'] changes. <?php session_start(); if($_POST['submit'] != 'go') { if(empty($_SESSION['foo'])) $_SESSION['foo'] = 'foo'; } else $foo = $_POST['foo']; // This assignment overwrites $_SESSION['foo'] if and only if register_globals is on ?> <html> <body> <?php echo 'Session:'.$_SESSION['foo'] ?> <form action="session_test.php" method="post"> <input type="text" name="foo" /> <input type="submit" name="submit" value="go" /> </form> </body> </html> ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=23732&edit=1